The KL → π± π0 e∓ νe (antī νe) decay was investigated with the NA48 detector at CERN SPS using a beam of long-lived neutral kaons. The branching ratio Br(KL → π± π0 e∓ νe (anti νe)) = (5.21 ± 0.07(stat) ± 0.09(syst)) × 10^−5 was fixed from a sample of 5464 events with 62 background events. The form factors fs , fp , λg and h were found to be in agreement with previous measurements but with higher accuracy. The coupling parameter of the chiral Lagrangian L3 = (−4.1 ± 0.2) × 10^−3 was evaluated from the data.
Measurement of the branching ratio and form factors for the decay K L → π±π0e ∓νe(ν̄e) / A., L., D., M., A., B., R. S., D., T. J., G., B., H., G. E., K., C., L., D. J., M., E., O., M. A., P., T. O., W., S. A., W., G., B., G., B., A., C., T., C.D., D., C., G., D., N., D., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 595:1-4(2004), pp. 75-85. [10.1016/j.physletb.2004.05.026]
Measurement of the branching ratio and form factors for the decay K L → π±π0e ∓νe(ν̄e)
BIZZETI, Andrea;
2004
Abstract
The KL → π± π0 e∓ νe (antī νe) decay was investigated with the NA48 detector at CERN SPS using a beam of long-lived neutral kaons. The branching ratio Br(KL → π± π0 e∓ νe (anti νe)) = (5.21 ± 0.07(stat) ± 0.09(syst)) × 10^−5 was fixed from a sample of 5464 events with 62 background events. The form factors fs , fp , λg and h were found to be in agreement with previous measurements but with higher accuracy. The coupling parameter of the chiral Lagrangian L3 = (−4.1 ± 0.2) × 10^−3 was evaluated from the data.| File | Dimensione | Formato | |
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